209
FNCA52 TJSJ 160730
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 AM AST SUN AUG 16 2026
DISCUSSION
CRITICAL FUEL CONDITIONS CONTINUE TO PERSIST ACROSS THE ISLANDS,
WITH EXTREME DROUGHT CONDITIONS ACROSS PORTIONS OF THE SOUTHERN
COASTAL PLAINS AND EASTERN PORTIONS OF PUERTO RICO. A TROPICAL
WAVE WITH ITS AXIS LOCATED OVER PUERTO RICO, WILL CONTINUE TO
MOVE WESTWARD AND AWAY FROM THE REGION LATER TODAY. HOWEVER, A
DRIER AIRMASS WILL FOLLOW AND IT IS EXPECTED TO DROP RELATIVE
HUMIDITY SIGNIFICANTLY TO BELOW THRESHOLD VALUES. AS ANTICIPATED,
THESE CONDITIONS COMBINED WITH LITTLE TO NO WETTING RAINFALL,
ONGOING RAINFALL DEFICITS, STRESSED VEGETATION, AND DRY FUELS
WILL MAINTAIN CONDITIONS FAVORABLE FOR RAPID FIRE SPREAD. THE
GREATEST CONCERN REMAINS ACROSS SOUTHERN AND SOUTHWESTERN PUERTO
RICO, WHERE FUELS ARE PARTICULARLY DRY AND RECENT FIRE ACTIVITY
HAS BEEN MORE FREQUENT. HOWEVER, ELEVATED FIRE DANGER WILL
CONTINUE ACROSS PUERTO RICO, VIEQUES, CULEBRA, AND THE U.S.
VIRGIN ISLANDS. THEREFORE, A FIRE DANGER STATEMENT IS IN EFFECT
FROM 10 AM THROUGH 5 PM AST. RESIDENTS AND VISITORS ARE
ENCOURAGED TO AVOID OUTDOOR BURNING, AS CONDITIONS WILL LIKELY BE
FAVORABLE FOR WILDFIRE IGNITION AND RAPID SPREAD.
PRZ014-162000-
SOUTHEAST COASTAL PLAINS-
330 AM AST SUN AUG 16 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 0 10
TEMP (24H TREND) 92 (+1) 75 (-2) 93
RH % (24H TREND) 44 (-12) 83 (-8) 42
WIND 20FT/EARLY(MPH) E 19 E 14 E 16
WIND 20FT/LATE(MPH) E 21 NE 12 SE 17
MIXING HGT(FT-AGL/MSL)4680 4950
TRANSPORT WND (MPH) E 21 E 16
VENT RATE (KT-FT) 84240 69300
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ015-162000-
SOUTHERN HILLS-
330 AM AST SUN AUG 16 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 20
TEMP (24H TREND) 90 (+3) 71 (-4) 91
RH % (24H TREND) 56 (-5) 96 (+2) 53
WIND 20FT/EARLY(MPH) E 14 E 14 E 14
WIND 20FT/LATE(MPH) E 17 NE 13 E 13
MIXING HGT(FT-AGL/MSL)5280 5450
TRANSPORT WND (MPH) E 20 E 14
VENT RATE (KT-FT) 89760 65400
DISPERSION 5 5
DSI 6 3 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ016-162000-
NORTH COASTAL PLAINS-
330 AM AST SUN AUG 16 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 30
TEMP (24H TREND) 91 (+1) 74 (-4) 91
RH % (24H TREND) 60 (-7) 94 (-1) 59
WIND 20FT/EARLY(MPH) E 19 E 20 E 16
WIND 20FT/LATE(MPH) E 21 E 13 E 19
MIXING HGT(FT-AGL/MSL)4680 4800
TRANSPORT WND (MPH) E 21 E 16
VENT RATE (KT-FT) 84240 67200
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ017-162000-
NORTHERN HILLS-
330 AM AST SUN AUG 16 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 40 0 50
TEMP (24H TREND) 90 (+2) 72 (-3) 90
RH % (24H TREND) 61 (-4) 97 (-1) 59
WIND 20FT/EARLY(MPH) E 17 E 19 E 13
WIND 20FT/LATE(MPH) NE 19 E 12 NE 16
MIXING HGT(FT-AGL/MSL)5490 5750
TRANSPORT WND (MPH) E 16 E 10
VENT RATE (KT-FT) 76860 51750
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ018-162000-
WEST COAST-
330 AM AST SUN AUG 16 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY CLEAR PCLDY
PRECIP TYPE TSTMS NONE TSTMS
CHANCE PRECIP (%) 50 0 60
TEMP (24H TREND) 93 (+1) 73 (-3) 93
RH % (24H TREND) 59 (-2) 95 (+2) 56
WIND 20FT/EARLY(MPH) E 18 E 17 E 12
WIND 20FT/LATE(MPH) E 17 E 14 E 13
MIXING HGT(FT-AGL/MSL)4940 5270
TRANSPORT WND (MPH) E 13 E 8
VENT RATE (KT-FT) 54340 36890
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ019-162000-
EASTERN INTERIOR-
330 AM AST SUN AUG 16 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 30 10 20
TEMP (24H TREND) 90 (+2) 73 (-3) 91
RH % (24H TREND) 59 (-7) 96 (-1) 56
WIND 20FT/EARLY(MPH) E 16 E 14 E 14
WIND 20FT/LATE(MPH) E 13 E 13 E 12
MIXING HGT(FT-AGL/MSL)5050 5530
TRANSPORT WND (MPH) E 18 E 14
VENT RATE (KT-FT) 80800 66360
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ022-162000-
LUQUILLO MOUNTAIN RANGE-
330 AM AST SUN AUG 16 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 40 20 20
TEMP (24H TREND) 85 (+3) 71 (-2) 86
RH % (24H TREND) 64 (-11) 99 (0) 63
WIND 20FT/EARLY(MPH) E 13 E 10 E 12
WIND 20FT/LATE(MPH) E 13 E 10 E 11
MIXING HGT(FT-AGL/MSL)4580 4660
TRANSPORT WND (MPH) E 18 E 16
VENT RATE (KT-FT) 73280 65240
DISPERSION 5 5
DSI 6 5 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ023-162000-
CENTRAL MOUNTAIN RANGE-
330 AM AST SUN AUG 16 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SHOWERS NONE TSTMS
CHANCE PRECIP (%) 50 0 40
TEMP (24H TREND) 89 (+5) 69 (-4) 89
RH % (24H TREND) 61 (-6) 98 (+1) 59
WIND 20FT/EARLY(MPH) E 13 E 12 E 9
WIND 20FT/LATE(MPH) E 12 E 12 E 10
MIXING HGT(FT-AGL/MSL)6790 7150
TRANSPORT WND (MPH) E 13 E 6
VENT RATE (KT-FT) 74690 35750
DISPERSION 5 5
DSI 6 2 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ024-162000-
CAYEY MOUNTAIN RANGE-
330 AM AST SUN AUG 16 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 10 10
TEMP (24H TREND) 86 (+2) 70 (-3) 86
RH % (24H TREND) 65 (-3) 98 (-2) 61
WIND 20FT/EARLY(MPH) E 13 E 12 E 12
WIND 20FT/LATE(MPH) E 13 E 11 E 11
MIXING HGT(FT-AGL/MSL)4780 4820
TRANSPORT WND (MPH) E 21 E 15
VENT RATE (KT-FT) 86040 62660
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ025-162000-
VIEQUES-
330 AM AST SUN AUG 16 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 20
TEMP (24H TREND) 90 (0) 80 (0) 90
RH % (24H TREND) 56 (-6) 83 (-4) 55
WIND 20FT/EARLY(MPH) E 19 E 16 E 17
WIND 20FT/LATE(MPH) E 16 E 16 E 13
MIXING HGT(FT-AGL/MSL)4060 3650
TRANSPORT WND (MPH) E 22 E 17
VENT RATE (KT-FT) 77140 54750
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ026-162000-
CULEBRA-
330 AM AST SUN AUG 16 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 20 20 20
TEMP (24H TREND) 91 (+2) 79 (-2) 91
RH % (24H TREND) 58 (-11) 87 (-1) 57
WIND 20FT/EARLY(MPH) E 18 E 17 E 17
WIND 20FT/LATE(MPH) E 14 E 17 E 12
MIXING HGT(FT-AGL/MSL)4070 3650
TRANSPORT WND (MPH) E 22 E 20
VENT RATE (KT-FT) 77330 62050
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
PRZ027-162000-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 AM AST SUN AUG 16 2026
TODAY TONIGHT MON
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE SHOWERS
CHANCE PRECIP (%) 20 0 20
TEMP (24H TREND) 93 (+1) 75 (-3) 93
RH % (24H TREND) 46 (-9) 86 (-1) 46
WIND 20FT/EARLY(MPH) E 21 E 18 E 18
WIND 20FT/LATE(MPH) E 25 G33 E 12 SE 19
MIXING HGT(FT-AGL/MSL)4880 5230
TRANSPORT WND (MPH) E 18 E 16
VENT RATE (KT-FT) 78080 73220
DISPERSION 5 5
DSI 6 4 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ001-162000-
SAINT THOMAS AND SAINT JOHN-
330 AM AST SUN AUG 16 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR PCLDY MCLEAR
PRECIP TYPE SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 10 20 20
TEMP (24H TREND) 89 (+2) 78 (-3) 89
RH % (24H TREND) 58 (-10) 88 (+1) 59
WIND 20FT/EARLY(MPH) E 19 E 18 E 19
WIND 20FT/LATE(MPH) E 16 E 19 E 13
MIXING HGT(FT-AGL/MSL)4100 3490
TRANSPORT WND (MPH) E 23 E 20
VENT RATE (KT-FT) 82000 59330
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
VIZ002-162000-
ST CROIX-
330 AM AST SUN AUG 16 2026
TODAY TONIGHT MON
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE SHOWERS SHOWERS NONE
CHANCE PRECIP (%) 20 20 0
TEMP (24H TREND) 90 (+2) 78 (-2) 90
RH % (24H TREND) 60 (-9) 88 (-2) 61
WIND 20FT/EARLY(MPH) E 18 E 17 E 16
WIND 20FT/LATE(MPH) E 17 E 17 E 14
MIXING HGT(FT-AGL/MSL)4640 4980
TRANSPORT WND (MPH) E 26 E 22
VENT RATE (KT-FT) 106720 94620
DISPERSION 5 5
DSI 6 6 6
RH RECOVERY EXCELLENT
REMARKS...NONE.
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